JPH07307809A - Memory card type exclusive extension interface device - Google Patents

Abstract

PURPOSE:To utilize effectively the hardware resource of a data terminal equipment by using an exclusive use inter face card and an interface adaptor. CONSTITUTION:A control means 27 receives a control message from a data terminal equipment 20a through a PCMICA memory card interface means 24 and a message communication means 26 and converts the message into a control message to a digital exchange. The control message is sent to a transmission line interface via an exclusive use extension interface adaptor connection means 25 and an exclusive use extension interface card connection means 28. The control message from the exchange is received by an interface means 29, and is converted into a control message leading to a terminal equipment 20 by a control means 27 via the card connection means 28 and the adaptor connection means. The converted control message is sent to the terminal equipment 20 via a communication means 26 and the interface connection means 24. The call transmission reception is made by control message communication as above and talking by handsets is made via the voice interface means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PCMC which has recently been installed in a portable personal computer or the like.
The present invention relates to a memory card type dedicated extension interface device which is inserted into an IA interface slot and is connected to a dedicated extension interface of a digital private branch exchange to realize voice and data communication.

[0002]

2. Description of the Related Art FIG. 8 is a system configuration diagram of a conventional dedicated digital telephone and a data terminal device, and FIG. 9 is a flow chart showing a calling operation using the conventional dedicated digital telephone and data terminal device system.

In FIG. 8, 1 is a data terminal device, 2 is a dedicated digital telephone, 3 is an RS232C cable, 4
Is RS232C connector, 5 is modular jack, 6
Is an RS232C interface unit which controls data communication between the data terminal device 1 and the dedicated digital telephone 2, 7 is a transmission line interface unit which controls communication of digital voice data and control system data between the digital private branch exchange and the dedicated digital telephone 2, and 8 is A power feeding unit for supplying the power supplied through the telephone line to the inside of the dedicated digital telephone, 9 is a handset, 10 is a speaker, and 11 is a handset after converting the output voice data of the transmission line interface unit 7 into an analog voice signal. A voice interface unit having a function of converting the analog voice signal from the handset 9 into digital voice data and outputting the digital voice data to the transmission line interface unit 7 at the same time as outputting to the speaker 9 and a function of outputting an audible sound such as a ring tone to the speaker 10. , 12 is a display unit for displaying dial numbers etc. when making a call, and 13 is Dial operation unit 14 is a control unit that performs integrated control in accordance with the operating conditions of the incoming and outgoing of the above units.

The operation of making a call in the system configured as described above will be described with reference to FIG. First, the data terminal device 1 sends an off-hook message via the RS232C interface unit 6 (S1). The control unit 14 of the dedicated digital telephone 2 uses the R
When the S232C interface unit 6 receives the off-hook message (S2), the off-hook message is converted into a control system data communication format with the digital private branch exchange (S3), and the transmission line interface unit 7
Via the private branch exchange (S4).
When the off-hook message is accepted by the digital private branch exchange, the control unit 14 receives the control system data indicating the dial permission message via the transmission line interface unit 7 (S5). Therefore, the control unit 14 converts the dial permission message into a communication format between the data terminal devices (S6), and the RS232C interface unit 6
It is transmitted to the data terminal device 1 via (S7). At this time, the control unit 14 controls the voice interface unit 11 to send a dial tone from the speaker 10 (S8).

Next, the data terminal device 1 is RS232C.
The destination dial number is transmitted via the interface unit 6 (S9). Control unit 14 of dedicated digital telephone 2
When the RS232C interface unit 6 receives the destination dial number (S10), the RS232C interface unit 6 converts the destination dial number into a control system data communication format with the digital private branch exchange (S11), and transmits it via the transmission line interface unit 7. , To the digital private branch exchange (S1
2). When the destination dial number is accepted by the digital private branch exchange, the control unit 14 receives the call-destination message or the busy-destination message via the transmission line interface unit 7 depending on the state of the other party (S13). This information is notified to the data terminal device in the same manner as described above (S14, S15). At this time, the control unit 14 controls the voice interface unit 11 to output a ringback tone or a busy tone from the speaker 10 (S16, S17). When the other party's calling message is received, the data terminal device 1 displays the calling on the display (S18), and the calling operation is completed.

When the ring back tone is transmitted, the dedicated digital telephone 2 is in a connection waiting state (S2
0), when the busy tone is transmitted, the on-hook waiting state is set (S21). Here, when the on-hook message is transmitted from the data terminal device 1 (S19), the control unit 14 of the dedicated digital telephone 2 receives the on-hook message at the RS232C interface unit 6 (S22), and the on-hook message is digitally transmitted. Convert to the control system data communication format with the private branch exchange (S
23), the transmission operation is completed by transmitting to the digital private branch exchange via the transmission line interface section 7 (S24).

[0007]

In such a conventional data terminal device and a dedicated digital telephone, the dial operation of the digital telephone is performed by the dial operation of the keyboard of the data terminal device and the display of the incoming / outgoing state of the display. There is a problem in that the operation unit and the display unit are not used at all, and the hardware resources are wasted.

The present invention has been made to solve the above-mentioned conventional problems. First, various switches and a display unit represented by a dial operating unit equipped in a conventional dedicated digital telephone are omitted. It is an object of the present invention to provide a memory card type dedicated extension interface device which eliminates duplication of hardware resources by realizing these functions in a data terminal device.

Secondly, it is an object of the present invention to provide a memory card type dedicated extension interface device in which a handset is not provided.

Thirdly, it is an object of the present invention to provide a memory card type dedicated extension interface device which can realize a minimum calling / receiving function without a data terminal device.

[0011]

In order to achieve the above object, a memory card type private extension interface device of the present invention comprises a private extension interface card inserted into a PCMCIA card slot of a data terminal device and a digital private branch exchange. The dedicated extension interface card comprises a PCMCIA memory card interface means, a message communication means for communicating with the data terminal device via the PCMCIA memory card interface means, and a dedicated extension interface adapter having a connection function with the handset interface function and a handset interface function. It has an extension interface adapter connection means, a control message transmission / reception function with the data terminal device, and a hardware control function in the dedicated extension interface adapter via the dedicated extension interface adapter connection means. The dedicated extension interface adapter comprises a dedicated extension interface card connection means, a transmission line interface means for communicating digital voice data and control system data with the digital private branch exchange, and a handset and a transmission line interface. The audio interface means controls the mutual conversion between digital audio data and analog audio signals, and the power supply means for supplying the power supplied via the telephone line to the dedicated extension interface adapter and the dedicated extension interface card.

Further, the dedicated extension interface adapter is equipped with a microphone and a speaker, and the voice interface means is provided with an analog voice signal input function from the microphone, an analog voice signal output function to the speaker, and a speakerphone call function.

Further, the dedicated extension interface card is provided with a dial operation means and an incoming / outgoing call display means.

[0014]

With the above-described structure, firstly, the control message from the data terminal device is received by the control means through the PCMCIA memory card interface means and the message communication means, converted into the control message to the digital private branch exchange, and then the dedicated extension line is sent. It is passed to the transmission line interface means through the interface adapter connection means and the dedicated extension interface card connection means, and after the control message from the digital private branch exchange is received by the transmission line interface means, the control means and the dedicated extension interface card connection means are dedicated. After receiving via the extension interface adapter connection means and converting into a control message to the data terminal device, the control message communication is passed to the data terminal device via the message communication means and the PCMCIA memory card interface means. It is possible to realize a communication state by the handset connected via an audio interface unit performs a receive calls operated by.

Secondly, according to an instruction from the data terminal device,
A hands-free call function can be realized by enabling the speakerphone call function.

Thirdly, the presence / absence of connection of the data terminal device is detected by the control means, and when the data terminal device is not connected, the dial operation means and the incoming / outgoing call display means are made effective, and the data terminal device is not provided. It is possible to make and receive calls.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.
~ It demonstrates with reference to FIG. FIG. 1 is a system configuration diagram of a memory card type dedicated extension interface device according to the first embodiment of the present invention, and FIG. 2 shows a transmission operation using the memory card type dedicated extension interface device according to the first embodiment of the present invention. It is a flowchart. In FIG. 1, 20 is a data terminal device, 21 is a dedicated extension interface card, 22 is a dedicated extension interface adapter, 2
3 is a handset. Dedicated extension interface card 2
1 is a PCMCIA memory card interface connecting means 24 for inserting into a PCMCIA memory card slot of a data terminal device, a dedicated extension interface adapter connecting means 25 for controlling the dedicated extension interface adapter 22, and a data terminal device 20. Message communication means 26 for communicating control messages between
And a control means 27 for controlling the entire memory card type dedicated extension interface device. Here, the message communication means 26 is a dual port memory or FIF.
It is composed of an O memory and the like.

The dedicated extension interface adapter 22 is
Dedicated extension interface card connection means 28 for connecting to the dedicated extension interface card 21 and transmission line interface means 29 for controlling transmission of digital voice data and control data between the digital private branch exchange.
, Voice interface means A30 for performing mutual conversion between digital voice data and analog voice signals between the handset and the transmission line interface, and power supplied via the telephone line in the dedicated extension interface adapter 22 and the dedicated extension interface card 21. Power supply means 3 for supplying inside
1, a modular jack 32 for connecting a telephone line and a handset jack 33 for connecting a handset.

In the memory card type dedicated extension interface device configured as described above, a case of performing a transmitting operation will be described in detail. First, the data terminal device 2
0 sends an off-hook message to the message communication means 26 via the PCMCIA memory card interface connection means 24 (S30). The control means 27 receives the off-hook message by monitoring the message communication means 26 (S31). The control means 27 converts the off-hook message into a communication format with the digital private branch exchange (S32), and then passes it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 sends the off-hook message to the digital private branch exchange (S).
33).

After that, the transmission line interface means 2
9 receives the dial permission message from the digital private branch exchange (S34). The control means 27 monitors the transmission line interface means 29 to send a dial permission message to the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28.
Receive through. The control means 27 converts the dial permission message into a communication format with the data terminal device (S35), and then transmits it to the message communication means 26 (S3).
6). The data terminal device 20 has a message communication means 26.
PCMCIA memory card interface connection means 2
By monitoring via 4, the dial authorization message is received.

Next, when the data terminal device 20 receives the dial permission message, the speaker built in the data terminal device 20 sends a dial tone (S3).
7) The destination dial number message is sent to the message communication means 26 via the PCMCIA memory card interface connection means 24 (S38). Control means 27
Receives the destination dial number message by monitoring the message communication means 26 (S39). The control means 27 converts the destination dial number message into a communication format with the digital private branch exchange (S40), and then passes it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 sends the destination dial number message to the digital private branch exchange (S41).

After that, the transmission line interface means 2
9 receives the response message from the digital private branch exchange (S42). By controlling the transmission line interface means 29, the control means 27 receives the response message via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The control means 27 sends the response message to the data terminal device 2
After being converted into a communication format with 0 (S43), it is transmitted to the message communication means (S44). Data terminal device 20
Receives the response message by monitoring the message communication unit 26 via the PCMCIA memory card interface connection unit 24.

The response messages considered here are the other party busy message and the other party calling message. Now, when the other party's busy message is received, the data terminal device 20 outputs a busy tone from the speaker (S45), and sends an on-hook message to the message communication means 26 via the PCMCIA memory card interface connection means 24 (S46). , The outgoing operation is completed. The control means 27 receives the on-hook message by monitoring the message communication means 26 (S47).
The control means 27 converts the on-hook message into a communication format with the digital private branch exchange (S48), and then passes it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 sends the on-hook message to the digital private branch exchange (S49) to complete the calling operation.

Next, when the data terminal device 20 receives the call-destination message, the data terminal device 20 outputs a ringback tone from the speaker and displays a call-in progress on the display (S50).

After that, the transmission line interface means 2
9 receives the connection establishment message from the digital private branch exchange (S51). The control means 27 monitors the transmission line interface means 29 to send a connection establishment message to the dedicated extension interface adapter connection means 2
5. Received via the dedicated extension interface card connection means 28. The control means 27 converts the connection establishment message into a communication format with the data terminal device 20 (S5).
2) The message is transmitted to the message communication unit 26 (S53), the voice interface unit A30 and the handset 23 are connected (S54), and the transmission operation is completed.

The data terminal device 20 monitors the message communication means 26 via the PCMCIA memory card interface connection means 24, and when the connection establishment message is received, displays a busy message on the display (S5).
5) The transmission operation is completed.

The second embodiment of the present invention will be described below with reference to FIGS. FIG. 3 is a system configuration diagram of a memory card dedicated extension interface device according to the second embodiment of the present invention, and FIG. 4 shows a calling operation using the memory card dedicated extension interface device according to the second embodiment of the present invention. It is a flowchart. In FIG. 3, 34 is a dedicated extension interface adapter of the second embodiment, 35 is a microphone, 36 is a speaker, 37 is an analog audio signal input function from the microphone and an analog audio signal output function to the speaker, and these are used. A voice interface unit B having a speakerphone function. In FIG. 3, the components having the same numbers as in FIG. 1 have the same functions.

In the memory card type dedicated extension interface device configured as described above, a case of making a transmission operation will be described in detail. First, the data terminal device 2
0 sends an off-hook message in the speakerphone call mode to the message communication means 26 via the PCMCIA memory card interface connection means 24 (S6).
0). The control unit 27 receives the off-hook message in the speakerphone call mode by monitoring the message communication unit 26 (S61). After converting the off-hook message in the speakerphone call mode into a communication format with the digital private branch exchange (S62), the control means 27 transfers it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. hand over. The transmission line interface means 29 sends an off-hook message in the speakerphone call mode to the digital private branch exchange (S6).
3).

After that, the transmission line interface means 2
9 receives the dial permission message from the digital private branch exchange (S64). The control means 27 monitors the transmission line interface means 29 to send a dial permission message to the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28.
Receive through. The control means 27 converts the dial permission message into a communication format with the data terminal device (S65) and then transmits it to the message communication means 26 (S).
66). The data terminal device 20 uses the message communication means 2
6 is monitored via the PCMCIA memory card interface connection means 24 to receive the dial permission message. Since the control means 27 goes off-hook in the speakerphone call mode, the control means 27 instructs the voice interface means B37 to activate the microphone 35 and the speaker 36 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. Then, it is controlled to send a dial tone to the speaker 36 (S67).

Next, when the data terminal device 20 receives the dial permission message, it writes the destination dial number message in the message communication means 26 via the PCMCIA memory card interface connection means 24 (S68). The control means 27 is the message communication means 26.
The callee dial number message is received by monitoring (S69). The control means 27 converts the destination dial number message into a communication format with the digital private branch exchange (S70), and then passes it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 sends the destination dial number message to the digital private branch exchange (S71).

After that, the transmission line interface means 2
9 receives the response message from the digital private branch exchange (S72). By controlling the transmission line interface means 29, the control means 27 receives the response message via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The control means 27 sends the response message to the data terminal device 2
After being converted into a communication format with 0 (S73), it is transmitted to the message communication means 26 (S74). The data terminal device 20 receives the response message by monitoring the message communication means 26 via the PCMCIA memory card interface connection means 24.

Possible response messages are the other party busy message and the other party calling message. Now, the data terminal device 20 when receiving the other party busy message displays the other party busy message on the display (S75), and sends the on-hook message to the message communication means 26 via the PCMCIA memory card interface connection means 24. Then (S76), the calling operation is completed.

The control means 27 when receiving the other party's busy message controls the voice interface means B37 to send a busy tone from the speaker 36 (S7).
7) The on-hook message is received by monitoring the message communication means 26 (S78). The control means 27 converts the on-hook message into a communication format with the digital private branch exchange (S79), and then passes it to the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 is
The on-hook message is sent to the digital private branch exchange (S80), and the operation of the voice interface means B37 is stopped to complete the calling operation.

Next, the data terminal device 20 when receiving the call-destination message on the other party displays a call-in progress on the display (S81), and the control means 27 sends a ringback tone from the speaker 36 to the voice interface means B37. Control is performed (S82).

After that, the transmission line interface means 2
9 receives the connection establishment message from the digital private branch exchange (S83). The control means 27 monitors the transmission line interface means 29 to send a connection establishment message to the dedicated extension interface adapter connection means 2
5. Received via the dedicated extension interface card connection means 28. The control means 27 converts the connection establishment message into a communication format with the data terminal device 20 (S8).
4) The message is transmitted to the message communication means 26 (S85), the speakerphone function of the voice interface means B37 is activated (S86), and the calling operation is completed.

The data terminal device 20 monitors the message communication means 26 via the PCMCIA memory card interface connection means 24 so that when the connection establishment message is received, the busy display is displayed on the display (S8).
7) The call origination operation is completed.

The third embodiment of the present invention will be described below with reference to FIGS. FIG. 5 is a system configuration diagram of a memory card type dedicated extension interface device according to the third embodiment of the present invention, and FIG. 6 shows a transmission operation using the memory card type dedicated extension interface device according to the third embodiment of the present invention. A flow chart, FIG. 7 is an external view of a dedicated extension interface card in the third embodiment of the present invention. In FIG. 5, reference numeral 40 is a dedicated extension interface card of the third embodiment, 38 is an incoming / outgoing call display means using a light emitting diode or the like, and 39 is a dial operation means as shown in the external view of FIG. In FIG. 5, the components having the same numbers as those in FIG. 2 have the same functions.

In the memory card type dedicated extension interface device configured as described above, the case of making a transmission operation will be described in detail. When the control means 27 detects that the user has pressed the hook switch by monitoring the dial operation means 39 (S90), an off-hook message is generated and converted into a communication format with the digital private branch exchange (S91). , To the transmission line interface means 29 via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 is
An off-hook message is sent to the digital private branch exchange (S92).

After that, the transmission line interface means 2
9 receives the dial permission message from the digital private branch exchange (S93). The control means 27 monitors the transmission line interface means 29 to send a dial permission message to the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28.
Receive through. The control means 27 lights up the incoming / outgoing call display and, at the same time, instructs the voice interface means B37 to activate the microphone 35 and the speaker 36 through the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28. Further, by controlling the speaker 36 to send a dial tone, the user is prompted to input a dial number (S9).
4).

Next, the control means 27 controls the dial operating means 3
When it is detected that the user has pressed the dial number by monitoring 9 (S95), a dialed number message for the destination is generated and converted into a communication format with the digital private branch exchange (S96), and the extension interface adapter is connected. It is passed to the transmission line interface means 29 through the means 25 and the dedicated extension interface card connection means 28. The transmission line interface means 29 sends the destination dial number message to the digital private branch exchange (S97).

After that, the transmission line interface means 2
9 receives the response message from the digital private branch exchange (S98). By controlling the transmission line interface means 29, the control means 27 receives the response message via the dedicated extension interface adapter connection means 25 and the dedicated extension interface card connection means 28.

The response messages considered here are the busy message of the other party and the calling message of the other party. When the other party's busy message is received, the control means 27 controls the voice interface means B37 to send a busy tone from the speaker 36 (S9).
9) Wait for the user to press the hook switch.

When the control means 27 detects that the user has pressed the hook switch by monitoring the dial operation means 39 (S100), it generates an on-hook message and converts it into a communication format with the digital private branch exchange ( S101), dedicated extension interface adapter connection means 25, dedicated extension interface card connection means 2
8 to the transmission line interface means 29.
The transmission line interface means 29 sends an on-hook message to the digital private branch exchange (S102),
The transmission operation is completed by stopping the operation of the voice interface unit B.

Next, when the callee message is received, the control means 27 causes the voice interface means B3.
Then, the speaker 36 is controlled to send the ringback tone to the speaker 7 (S103).

After that, the transmission line interface means 2
9 receives the connection establishment message from the digital private branch exchange (S104). The control means 27 monitors the transmission line interface means 29 to send a connection establishment message to the dedicated extension interface adapter connection means 2
5. Received via the dedicated extension interface card connection means 28, activate the speakerphone function of the voice interface means B37 (S105), and complete the calling operation.

[0046]

According to the present invention, firstly, the control message from the data terminal device is converted into a control message to the digital private branch exchange by the control means through the PCMCIA memory card interface means and the message communication means. , Through the dedicated extension interface adapter connection means and the dedicated extension interface card connection means to the transmission line interface means, and after the control message from the digital private branch exchange is received by the transmission line interface means, the control means connects the dedicated extension interface card. Control message to be received via the means and the dedicated extension interface adapter connection means, converted into a control message to the data terminal device, and then passed to the data terminal device via the message communication means and the PCMCIA memory card interface means. Since the call state can be realized by the handset connected via the voice interface means by the call transmission / reception operation by the communication, the hardware resources of the data terminal device can be effectively used. Secondly, from the data terminal device , The hands-free call function can be realized by enabling the speakerphone call function. Thirdly, the control means detects whether or not the data terminal device is connected, and the data terminal device is not connected. In this case, there is an effect that it is possible to provide a memory card type dedicated extension interface device that enables the dial operation means and the incoming / outgoing call display means and enables incoming / outgoing calls without a data terminal device.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a memory card type dedicated extension interface device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a calling operation using the memory card type dedicated extension interface device according to the first embodiment of the present invention.

FIG. 3 is a system configuration diagram of a memory card type dedicated extension interface device according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a calling operation using the memory card type dedicated extension interface device according to the second embodiment of the present invention.

FIG. 5 is a system configuration diagram of a memory card type dedicated extension interface device according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing a calling operation using a memory card type extension interface device according to a third embodiment of the present invention.

FIG. 7 is an external view of a dedicated extension interface card according to a third embodiment of the present invention.

FIG. 8 is a system configuration diagram of a conventional dedicated digital telephone and a data terminal device.

FIG. 9 is a flowchart showing a call origination operation using a conventional dedicated digital telephone and data terminal device system.

[Explanation of symbols]

20 Data Terminal Equipment 21 Dedicated Extension Interface Card 22 Dedicated Extension Interface Adapter 23 Handset 24 PCMCIA Memory Card Interface Connection Means 25 Dedicated Extension Interface Adapter Connection Means 26 Message Communication Means 27 Control Means 28 Dedicated Extension Interface Card Connection Means 29 Transmission Line Interface Means 30 audio interface means A 31 power feeding means 32 modular jack 33 handset jack

Claims (3)

[Claims] 1. A dedicated extension interface card to be inserted into a PCMCIA card slot of a data terminal device, and a dedicated extension interface adapter having a function of connecting to a digital private branch exchange and a handset interface function, wherein the dedicated extension interface card is PCMCIA memory card interface means, message communication means with the data terminal device via the PCMCIA memory card interface means, dedicated extension interface adapter connection means, control message transmission / reception function with the data terminal device, and the dedicated extension interface adapter And a control unit having a hardware control function in the dedicated extension interface adapter via a connection unit, wherein the dedicated extension interface adapter is a dedicated extension interface card. Connection means, transmission line interface means for controlling communication of digital voice data and control system data with the digital private branch exchange, and voice interface means for controlling mutual conversion between digital voice data and analog voice signals between the handset and the transmission line interface. ,
Power supply means for supplying power supplied via a telephone line to the dedicated extension interface adapter and the dedicated extension interface card, and the control message from the data terminal device is transmitted by the control means to the PCMCIA memory card interface means. After being received through the message communication means and converted into a control message to the digital private branch exchange, the digital private branch exchange is passed to the transmission line interface means through the dedicated extension interface adapter connection means and the dedicated extension interface card connection means. After receiving the control message from the transmission line interface means, the control means receives it via the dedicated extension interface card connection means and the dedicated extension interface adapter connection means, and sends a control message to the data terminal device. After being converted into a message, a call state by a handset connected through the voice interface means is performed by a control message communication of passing the data to a data terminal device through the message communication means and the PCMCIA memory card interface means. A memory card type dedicated extension interface device that realizes the following. 2. A structure in which a dedicated extension interface adapter is equipped with a microphone and a speaker, and an audio interface means is provided with an analog audio signal input function from the microphone, an analog audio signal output function to the speaker, and a speakerphone call function. 2. The memory card type extension interface device according to claim 1, wherein a hands-free call is enabled by enabling the speakerphone call function according to an instruction from a terminal device. 3. A dedicated extension interface card to which dial operation means and outgoing / incoming call display means are added, the control means detects whether or not the data terminal device is connected, and when the data terminal device is not connected, 2. The dedicated extension interface device for a memory card type according to claim 1, wherein the dial operation means and the incoming / outgoing call display means realize the outgoing / incoming call function.